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Title: Enforced liquid crystalline properties of dibenzo[a,c]phenazine dimer and self assembly
Authors: Tzeng, M.-C.
Liao, S.-C.
Chang, T.-H.
Yang, S.-C.
Weng, M.-W.
Yang, H.-C.
Chiang, M.Y.
Kai, Z. 
Wu, J. 
Ong, C.W.
Issue Date: 14-Feb-2011
Citation: Tzeng, M.-C., Liao, S.-C., Chang, T.-H., Yang, S.-C., Weng, M.-W., Yang, H.-C., Chiang, M.Y., Kai, Z., Wu, J., Ong, C.W. (2011-02-14). Enforced liquid crystalline properties of dibenzo[a,c]phenazine dimer and self assembly. Journal of Materials Chemistry 21 (6) : 1704-1712. ScholarBank@NUS Repository.
Abstract: Dibenzo[a,c]phenazine dimers with the following features: (i) short spacer, (ii) peripheral chains shorter and longer than the spacers, and (iii) reduced symmetrical structure of the disc were synthesized. The dibenzo[a,c]phenazine disc has enforced the self-assembly of discotic dimers connected through six methylene spacers to form mesophases through a folded conformation in the mesophase. An X-ray diffraction study pinpoints the preferential intra-molecular bridging conformation of these dimers at the mesophase. These new discotic dimers showed polymesomorphism and glass formation. Interestingly, these discotic dimers form organogels with non-polar hydrocarbon solvents and long chain aliphatic alcohols. A superstructure arising from association of the nanofibers was observed with transmission electron microscopy. © 2011 The Royal Society of Chemistry.
Source Title: Journal of Materials Chemistry
ISSN: 09599428
DOI: 10.1039/c0jm01636e
Appears in Collections:Staff Publications

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